import java.util.Scanner;
public class Example2_3 {
  public static void main (String args[]) {
    System.out.println("请输入若干个数，每输入一个数回车确认");
    System.out.println("最后输入数字0结束输入操作");
    Scanner reader= new Scanner(System.in);
    double sum =0;
    double x =reader.nextDouble();
    while(x!=0){
      sum=sum+x;
      x= reader.nextDouble();
    }
    System.out.println("sum="+sum);
  }
}
